WO2022009230A1 - Système et procédé de purification de l'air - Google Patents

Système et procédé de purification de l'air Download PDF

Info

Publication number
WO2022009230A1
WO2022009230A1 PCT/IN2021/050664 IN2021050664W WO2022009230A1 WO 2022009230 A1 WO2022009230 A1 WO 2022009230A1 IN 2021050664 W IN2021050664 W IN 2021050664W WO 2022009230 A1 WO2022009230 A1 WO 2022009230A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
filter
source
purification system
impure
Prior art date
Application number
PCT/IN2021/050664
Other languages
English (en)
Inventor
Ravi Kaushik
Yelia SHANKARANARAYANA MAYYA
Rochish THAOKAR
Original Assignee
Indian Institute Of Technology Bombay
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Indian Institute Of Technology Bombay filed Critical Indian Institute Of Technology Bombay
Priority to US18/015,276 priority Critical patent/US20230338605A1/en
Publication of WO2022009230A1 publication Critical patent/WO2022009230A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/01—Deodorant compositions
    • A61L9/014—Deodorant compositions containing sorbent material, e.g. activated carbon
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/22—Ionisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0028—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions provided with antibacterial or antifungal means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0032—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions using electrostatic forces to remove particles, e.g. electret filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0039—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices
    • B01D46/0047—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for discharging the filtered gas
    • B01D46/0049—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with flow guiding by feed or discharge devices for discharging the filtered gas containing fixed gas displacement elements or cores
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/80—Chemical processes for the removal of the retained particles, e.g. by burning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/88—Handling or mounting catalysts
    • B01D53/885—Devices in general for catalytic purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/016—Pretreatment of the gases prior to electrostatic precipitation by acoustic or electromagnetic energy, e.g. ultraviolet light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/14—Plant or installations having external electricity supply dry type characterised by the additional use of mechanical effects, e.g. gravity
    • B03C3/155—Filtration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/15—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means
    • F24F8/167—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering by chemical means using catalytic reactions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/90—Cleaning of purification apparatus
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/12—Lighting means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/10—Apparatus features
    • A61L2209/14—Filtering means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
    • A61L2209/20—Method-related aspects
    • A61L2209/22—Treatment by sorption, e.g. absorption, adsorption, chemisorption, scrubbing, wet cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20707—Titanium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20792—Zinc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/30—Silica
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/915—Catalyst supported on particulate filters
    • B01D2255/9155—Wall flow filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
    • B01D2257/708—Volatile organic compounds V.O.C.'s
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/91—Bacteria; Microorganisms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/06—Polluted air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/804—UV light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2279/00—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses
    • B01D2279/65—Filters adapted for separating dispersed particles from gases or vapours specially modified for specific uses for the sterilisation of air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Definitions

  • the invention relates to air purifiers and a method of purification.
  • the invention relates to the field of air purification and disinfection.
  • COVID 19 pandemic has played a key role in highlighting the need for sanitization and disinfection practices to control the spread of pathogenic organisms in enclosed environments such as in transportation and business settings/restaurants or residential settings.
  • a PCT publication no. WO2018093837 by Aerobiotix, Inc. dated 15-11-2017, titled "Air germicidal device” discloses an air germicidal treatment device and system for removing or eliminating unwanted pathogens or bacteria in an airstream.
  • the device or system has a removable irradiation chamber that divides an interior area of the device into an air pre-chamber area, an air post-chamber area, and an irradiation area therebetween.
  • a US patent numbered US5185015 by Searle Bruce R dated 1991-03-18, titled “Filter apparatus” discloses a filter apparatus for removing contaminants from air including a first filter element removing particles greater than a predetermined size from air entering the housing by way of the inlet opening, and a second filter element removing particles of selected chemical species from the air that has passed through the first filter element in the direction from the inlet opening to the outlet opening.
  • the second filter element defines a chamber that is in open communication with the outlet opening, and the chamber constitutes a third filter element in which air is irradiated with ultraviolet light.
  • An object of the present invention is to provide a self-cleaning air purifier and a method of purification which sanitizes, disinfects, and removes airborne pathogens.
  • Another object of the present invention is to provide a self-cleaning air purifier having a housing (with one inlet and one outlet, airflow means, one filter, at least one UV source, a chemical oxidant system, ionization system and chamber for placing objects and/or belongings therein for disinfection.
  • Another object of the present invention is to provide a UV light source, which is preferably positioned longitudinally to the flow of air ensuring continuous disinfection of the incoming airstream due to increased residence time. In a setting allowing the air to flow parallel to the surface of the UV source.
  • Another object of the present invention is to provide a filter that is preferably positioned surrounding/around the UV source.
  • the filter is positioned such that air flows from the inner side to the outer side, where the inner side capturing the impurities are continuously subject to UV radiation and ionization related purifications, such as OH radical formation and inductive and capacitive forces on impurities.
  • Another object of the present invention is to provide a filter, that is preferably UV resistant, and the inner side of the filter is coated with a photocatalyst.
  • Another object of the present invention is to provide an inner coating that will enhance the process of disinfection by the production of OH radicals.
  • Another object of the present invention is to provide a filter that may further have the outer side coated with an adsorbent to trap gases and VOCs (volatile organic compounds).
  • Another object of the present invention is to provide an outer coating of the photocatalyst that will ensure the surface of the purifier/device/system remains pathogen-free.
  • Another object of the present invention is to provide a filter that may also be impregnated with antimicrobial coating which may have silver and/or copper nanoparticles for further sanitization and disinfection effect.
  • Another object of the present invention is to provide a self-cleaning ability that is achieved by using electrostatic fields.
  • Another object of the present invention is to provide needles of ionizers that are used to create electric fields for air purification.
  • Another object of the present invention is to provide thin carbon fibers, which operate at a very high voltage and remove all kinds of deposited contaminants from the UV source surface.
  • Yet another object of the present invention is to provide a chemical oxidant that acts as an on-demand disinfection system.
  • Yet another object of the present invention is to provide an oxidant, which is stored in a non-reactive container inside the housing with a pump for atomization through the nozzle.
  • Still another object of the present invention is to provide a disinfecting chamber, which uses UV rays for the disinfection of small objects/items.
  • Still another object of the present invention is to provide a disinfecting chamber, and the walls of this chamber are coated with a material that reflects maximum UV light.
  • Still another object of the present invention is to provide an electrical compartment, which gives an appropriate power supply as well as controls the power supply.
  • Still another object of the present invention is to provide a sensor, which may also be provided such that it detects movement and automatically switches the purifier/device ON/OFF.
  • Still another object of the present invention is to provide outlet grills/housing, which is designed in such a way that there would avoid any direct eye contact with the UV source.
  • Still another object of the present invention is to provide a small, compact self-cleaning purifier/device/system that can be used to sanitize small, enclosed spaces like cars, cabins, etc.
  • Still another object of the present invention is to provide a method of purification and self-cleaning consisting of a plurality of purification mechanisms synergizing to create an increased efficiency.
  • Still another object of the present invention is to provide a DCD (Deactivate, Capture, Deactivate) approach/mechanism having a plurality of steps for air purification and disinfection.
  • DCD Deactivate, Capture, Deactivate
  • An aspect of the invention is disclosing about an air purification system, for purifying an incoming impure air, the system comprising a UV source configured to produce irradiation to effect microorganisms/pathogens.
  • An ionizer configured to generate dense electric field and thus produce OH radicals and/or H202 using the energy imparted by the UV source and a water source;
  • a filter having an inner surface and an outer surface, configured to trap impurities of the impure air and produce filtered air from the outer surface.
  • the UV source and ionizer are configured to face the inflow of impure air before the impure air reaches the filter.
  • a housing with at least an inlet, which is placed longitudinally towards the center of the housing, at a specified distance from the bottom; with at least a UV source, which kill microorganisms; with at least an electrical compartment, a photocatalytic coating on inside the filter assembly; with at least a chemical oxidant system, with at least a blower, and with at least an outlet; at least one needle of ionizer and a chamber for placing objects and/or belongings therein for disinfection.
  • Another aspect of the invention discloses about a UV source, which is positioned longitudinally to the flow of air ensuring continuous disinfection of the airstream due to increased residence time.
  • the UV source has a self-cleaning ability which is achieved by using electrostatic fields.
  • Another aspect of the invention discloses about a self-cleaning process, which includes carbon fibers from the ionizer which operates at very high voltage to remove all kinds of deposited contaminants from the surface of the UV source.
  • Another aspect of the invention discloses about a filter, which is placed above the UV source, and the air after irradiation with the UV rays passes through the filter.
  • the filter is positioned such that air flows from the inner side to the outer side.
  • the filter is preferably UV resistant, and the inner side of the filter is coated with a photocatalyst.
  • the filter further has an outer side coated with an adsorbent to trap gases and VOCs (volatile organic compounds).
  • a chemical oxidant is placed on the outer side of the filter and acts as on-demand disinfection.
  • Another aspect of the invention disclosed about the method which consists of a plurality of steps, includes different phases through which air travels and purifies using the DCD (deactivate, Capture, Deactivate) approach/mechanism.
  • Figure 1 illustrates a self-cleaning air purifier in accordance with an embodiment herein.
  • Figure 2 illustrates a self-cleaning air purifier as per an embodiment herein.
  • Figure 3 illustrates a view of the self-cleaning air purifier, as per an embodiment herein.
  • Figure 4 illustrates another view of the self-cleaning air purifier, as per an embodiment herein.
  • Figure 5 illustrates another view of the self-cleaning air purifier, as per an embodiment herein.
  • Figure 6 illustrates a self-cleaning air purifier housing, as per an embodiment herein.
  • Figure 7 illustrates a method of purification and self-cleaning as per an embodiment herein.
  • Figure 8 illustrates a DCD approach/mechanism as per an embodiment herein.
  • the referral numerals in the figures refer to: (100) an air purifier; (100A) - housing; (101) - inlet; (102)
  • an embodiment means that a particular feature, structure, characteristic, or function described in connection with the embodiment is included in at least one embodiment of the invention.
  • the appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
  • the headings and subheadings used in the document are not intended to limit the content therein to the respective heading or subheading. Rather, they are used to help readers navigate and prevent obscuring the invention.
  • the disclosure refers to purification to include various aspects including but not limited to sterilization, disinfection, sanitization, removal of particulate matter and harmful gases.
  • a self-cleaning air purifier may comprise of a UV source (102) configured to produce irradiation to effect microorganisms/pathogens; an ionizer (104) configured to generate dense electric field and thus produce OH radicals and/or H202 using the energy imparted by the UV source (102) and a water source; a filter (106) having an inner surface and an outer surface, configured to trap impurities of the impure air and produce filtered air from the outer surface; wherein the UV source (102) and ionizer (104) are configured to face the inflow of impure air before the impure air reaches the filter (106).
  • a UV source (102) configured to produce irradiation to effect microorganisms/pathogens
  • an ionizer (104) configured to generate dense electric field and thus produce OH radicals and/or H202 using the energy imparted by the UV source (102) and a water source
  • a filter (106) having an inner surface and an outer surface, configured to trap impurities of the impure air and produce
  • the inlet (101) is placed longitudinally towards the center of the housing, at a specified distance from the bottom; at least an electrical compartment (103), a photocatalytic coating (105) on inside the filter (106) assembly; with at least a chemical oxidant system (107), with at least a blower (108), and with at least an outlet (109); at least one needle (104A) and an chamber (104B) for placing objects and/or belongings therein for disinfection.
  • the present invention is directed towards a self-cleaning air purifier (100), having enhanced safety levels by keeping the inner and outer body of the device sterilized (air, surface, belongings) continuously.
  • the system (107) may be used for surface sterilization by aerosolizing chemical oxidation of known amount depending on the room size.
  • the present invention is also disclosing a method comprising the steps of first, subjecting the impure air to UV source causing inflight deactivation and surface deactivation of microorganisms in the impure air. Second, subjecting the impurities in the impure air to electrons produced by ionizer, thereby producing conductive and inductive forces for increased filtration by having impurities stick to the filter, and produce OH radicals using the energy imparted by the UV source and a water source, further causing inflight deactivation and surface deactivation of microorganisms in the impure air.
  • a filter having an inner surface and an outer surface, configured to trap impurities of the impure air and produce filtered air from the outer surface, wherein the directing of air causes impure air to be subject to UV source and ionizer before the impure air reaches the filter.
  • Impure air may be let into the system through an inlet (101) which is preferably placed longitudinally towards the center of the housing (100A), at a specified distance from the bottom, such that large-sized particles can not enter in the purifier/system (100). This aids in increasing the lifetime of the filter being used and also in improving the disinfection efficiency.
  • the impure air inlet and the outlet for purified air may be configured to allow for batch processing of the air. Further, in another embodiment the impure air inlet and the outlet for purified air may be configured to allow for continuous processing of the air.
  • the airflow is created by means of a blower (108) or a fan and has a rotatable head, thereby enabling adjustable/directional flow of air. This enables the sanitized air to be directed onto a person or object for a predetermined time to ensure one's safety against pathogens by the virtue of the direction of the air stream.
  • the UV light source (102) is preferably positioned longitudinally to the flow of air ensuring continuous disinfection of the airstream due to increased residence time.
  • the filter (106) is preferably positioned surrounding/around the UV source (102), whereby the UV rays continuously irradiate onto the inner side of filter (106) to kill microorganisms trapped therein and disinfect the filter (106). This aids in inactivating all kinds of the pathogen on filter (106) and the user won't be infected while handling the air purifier/device (100) (e.g., while filter replacement, repairing, etc).
  • the UV source (102) is being cleaned by using electrostatic fields.
  • the outlet grills/housing is designed in such a way that would avoid a direct eye contact with the UV source (102) in various configurations.
  • the UV source may be cylindrical. Further, the UV source may be configured to irradiate with wavelengths between 100 and 400 nm. In another embodiment, the UV source may also be flat as shown in figure 5.
  • an ionizer may be configured to generate dense electric fields and thus produce OH radicals and/or hydrogen peroxide using the energy imparted by the UV source and a water source.
  • the Ionizer is configured to induce conductive and inductive forces for increased filtration.
  • the ionizer is configured to generate anions to cause self cleaning of the UV source from the dust particles.
  • Carbon fibers from the ionizer (104) which operates at a very high voltage are used to remove all kinds of deposited contaminants from the UV surface. The carbon fibers operating at high voltage also help in the formation of OH radicals using H20 molecules in the ambient air which is a powerful oxidant and kills pathogens.
  • needles(104A) of the ionizer are used to create electric fields.
  • the carbon fibers and/or needles (104A) act as a secondary source of disinfection.
  • the filter (106) is positioned such that air flows from the inner side to the outer side.
  • the filter(106) is preferably UV resistant, with the inner side coated with a photocatalyst (105) selected from, but not limited to, Ti02, cuprous oxide, zinc oxide, and silicon dioxide which acts as an extra layer of sanitization for better disinfection through the process of photocatalysis.
  • the filter(106) can also be impregnated with silver nanoparticles (or any other material which has antimicrobial properties) for further sanitization and disinfection effect.
  • the filter (106) further has the outer side coated with an adsorbent (e.g. activated carbon) to trap gases and VOCs (volatile organic compounds).
  • an adsorbent e.g. activated carbon
  • the inner surface of the filter that faces inflow of the air may be configured to be facing the UV source. Furthermore, the inner surface of the filter that faces inflow of the air is also facing the ionizer. Furthermore, the outer surface of the filter is coated with an adsorbent to trap gases and VOCs. In one exemplary embodiment, the adsorbent may be activated carbon. [0058]
  • the filter is cylindrical in shape engulfing said UV source. This may allow for increased interaction of the UV source and the filter surface. In another embodiment,the filter may be flat in shape. This may provide for easier manufacturability.
  • a mesh towards the inner surface of the filter having photocatalyst coating is provided for increased effect on microorganisms/pathogens.
  • An anti microbial coating on the filter may be provided to affect the microorganism that are trapped in the filter.
  • a chemical oxidation system for introducing chemical oxidation agent into the filtered air after the filtration may also be provided.
  • the Chemical oxidant (107) may use chemicals such as hydrogen peroxide etc., which acts as an on-demand disinfection system.
  • the integrated chemical fogging system (107) comprising the chemical oxidant disinfects the air as well as the surface in a closed space/room.
  • the oxidant (107) is stored in a non-reactive container (107A) inside the housing optionally with a pump for atomization through the nozzle (107B).
  • the amount of chemical oxidant released in a specific amount of time may be controlled using a valve.
  • the disinfecting chamber (104B) uses UV rays for the disinfection of small objects/items.
  • Extra UV sources (102) may be included in these chambers (104B) if required.
  • the walls of this chamber (104B) may be coated with a material that reflects maximum UV light, such as dispersion of barium sulfate in an aqueous solution of a water-soluble inorganic binder.
  • the chamber (104B) is being used as a sterilization chamber (104B) for objects like mobiles, wallets etc.
  • the self-cleaning air-purifier (100) includes at least an electrical compartment (103) having a PCB ballast, which gives an appropriate power supply as well as controls the power supply to the UV
  • a sensor may also be provided such that it detects movement and automatically switches the device ON/OFF.
  • the present invention as illustrated in Figure 4 provides another embodiment of a self-cleaning air-purifier (100) comprising a housing (100A) having at least one inlet (101), at least one UV source (102) comprising a UV ballast and UV, at least one filter (106), which coated with a photocatalyst (105) and at least one outlet (109).
  • a self-cleaning air-purifier (100) designed for a duct with some flow rate at low pressure such as for cars. This may be more useful in situations where sterilization (microbial deactivation) is required, not filtration (air purification).
  • the air flow may be configured specially for cars because of restrictions in longitudinal direction.
  • the photocatalyst (105) is coated preferably on both the inner and outer body of the housing (100A).
  • the inner coating will enhance the process of disinfection by the production of OH radicals.
  • the outer coating of the photocatalyst will ensure the surface of the air-purifier/device (100) remains pathogen-free.
  • the photocatalyst (105) is selected from Titanium oxide, cuprous oxide, zinc oxide, and silicon dioxide which acts as an extra layer of sanitization for better disinfection and removes VOCs through the process of photocatalytic degradation.
  • the purifier may be provided to have a small, compact size, and due to which it can be used to sanitize small, enclosed spaces like cars, cabins, etc.
  • FIG. 5 Another embodiment of a self-cleaning air-purifier (100) comprising a filter (106) is placed above the UV source (102) and the air after irradiation with the UV rays passes through the flat filter (106) before moving towards the outlet (109).
  • Figure 6 illustrates a housing of the air purifier as per an embodiment herein.
  • a housing (100A) may be provided to have a cubical shape.
  • air ventilation holes may be provided on the upper and lower ends thereof.
  • a blower (108) may be provided on the upper end of the said cubical shape sitting next to an outlet (109).
  • the present invention as illustrated in Figure 7 another embodiment invention provides a method of air purification comprising the steps of: step 1 (700A), subjecting the impure air to UV source causing inflight deactivation and surface deactivation of microorganisms in the impure air.
  • step 2 (700B) subjecting the impurities in the impure air to electrons produced by ionizer, thereby producing conductive and inductive forces for increased filtration by having impurities stick to the filter, and produce OH radicals using the energy imparted by the UV source and a water source, further causing inflight deactivation and surface deactivation of microorganisms in the impure air.
  • Step 3 subjecting the impure air to a filter having an inner surface and an outer surface, configured to trap impurities of the impure air and produce filtered air from the outer surface, wherein the directing of air causes impure air to be subject to UV source and ionizer before the impure air reaches the filter.
  • Step 1 Deactivation includes i) The germs undergo inflight deactivation by germicidal rays and OH radicals as they travel along with the air purifier; ii) The continuous irradiation of germicidal rays and continuous bombardment of anions formed due to electromigration and OH radicals formed by ionization and photocatalysis deactivates the germs; iii) The air particles have a much higher residence time for inflight deactivation and a configuration that provides the highest possible intensity of germicidal rays and OH radicals.
  • purifier housing receives air from the inlet. Further, letting the air stream pass through the UV source, leads to inflight deactivation of microorganisms. Further, letting the air stream also pass through the Ionizer, leads to inflight deactivation of microorganisms due to OH radicals formed by ionization. Further, ionizer removes deposited dust on the UV source and maintains high disinfection efficiency of the device. Ionizers induce conductive and inductive forces for higher filtration efficiency. Further, a photocatalyst and/or anti-microbial coating of the filter acts as an extra layer of sterilization. External mesh is also used for photocatalyst coating to maximize the surface area.
  • Step 10 The filter outer side which is coated with an adsorbent that traps gases and VOCs. Further, an aspect includes directing the air toward the outlet using a blower.
  • the present invention provides a self-cleaning air purifier (100) utilizing integrated technology of UV radiation, photocatalysis, filtration, coatings and disinfectant spray in a unique and novel compact arrangement for removal of airborne infection while simultaneously disinfecting small personal belongings.
  • the present invention has the provision to holistically approach various aspects of air purification. More particularly, particulate matter either viable or non-viable will be removed using the present invention device.
  • the present invention self-cleaning air purifier/device provides filtration, disinfection, and sterilization of air streams as a complete solution to the problems of air pollution and disease spread. Also, dust and other particulate matter that gets deposited on the surface of the UV source which may affect the efficiency of the purifier/system over time is overcome using the self-cleaning approach hence creating automatic cleaning and maintenance, thereby improving efficiency.
  • the purifier/device remains sterilized such that overuse of filters doesn't make the purifier/device a source of microbial contamination.
  • UV source has a longitudinal arrangement between the air stream and UV light to significantly increase the residence time for better disinfection.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Materials Engineering (AREA)
  • Toxicology (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

L'invention se rapporte au domaine de la purification, de la stérilisation, de la désinfection, de l'assainissement, de l'élimination de matière particulaire et de gaz nocifs de l'air. Une source de lumière UV (102) est de préférence positionnée parallèlement au flux d'air assurant une désinfection continue du courant d'air en raison du temps de séjour augmenté, et un filtre (106) est de préférence positionné aux alentours/autour de la source UV. Dans un mode de réalisation, l'invention divulgue une capacité d'auto-nettoyage qui est obtenue au moyen de champs électrostatiques. Dans un autre mode de réalisation, un petit purificateur/dispositif auto-nettoyant compact peut être utilisé pour désinfecter de petits espaces fermés tels que des voitures, des cabines, etc.
PCT/IN2021/050664 2020-07-07 2021-07-07 Système et procédé de purification de l'air WO2022009230A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/015,276 US20230338605A1 (en) 2020-07-07 2021-07-07 An air purification system and method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202021028874 2020-07-07
IN202021028874 2020-07-07

Publications (1)

Publication Number Publication Date
WO2022009230A1 true WO2022009230A1 (fr) 2022-01-13

Family

ID=79553064

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2021/050664 WO2022009230A1 (fr) 2020-07-07 2021-07-07 Système et procédé de purification de l'air

Country Status (2)

Country Link
US (1) US20230338605A1 (fr)
WO (1) WO2022009230A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040013583A1 (en) * 2002-07-19 2004-01-22 Aerus Llc Apparatus and method for a sanitizing air filter
WO2007026050A1 (fr) * 2005-08-30 2007-03-08 Oy Desinfinator Ltd Dispositif de désinfection d’air
US20110030560A1 (en) * 2009-08-04 2011-02-10 Bohlen John R Air cleaner with multiple orientations
KR101386404B1 (ko) * 2013-10-08 2014-04-17 (주)구츠 타원관 형상의 광촉매모듈 및 이온클러스터 발생모듈을 갖는 공기살균정화장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040013583A1 (en) * 2002-07-19 2004-01-22 Aerus Llc Apparatus and method for a sanitizing air filter
WO2007026050A1 (fr) * 2005-08-30 2007-03-08 Oy Desinfinator Ltd Dispositif de désinfection d’air
US20110030560A1 (en) * 2009-08-04 2011-02-10 Bohlen John R Air cleaner with multiple orientations
KR101386404B1 (ko) * 2013-10-08 2014-04-17 (주)구츠 타원관 형상의 광촉매모듈 및 이온클러스터 발생모듈을 갖는 공기살균정화장치

Also Published As

Publication number Publication date
US20230338605A1 (en) 2023-10-26

Similar Documents

Publication Publication Date Title
US6797127B1 (en) Process and apparatus for purification of oxygen-containing gas
Vasilyak Physical methods of disinfection (a review)
KR102191144B1 (ko) 미세먼지제거, 세균 및 바이러스 살균, 습도조절, 산소 및 음이온 발생 기능을 가지는 다기능 공기정화장치
EP3097750B1 (fr) Appareil de désinfection d'air et d'élimination de pollution
US20150306271A1 (en) Adsorptive photo-catalytic oxidation air purification device
US20100135850A1 (en) Air disinfection device
CN103221117A (zh) 用于处理空气的过滤器及装置
US20230248874A1 (en) Air and surface treatment system
US20230173133A1 (en) Atmospheric plasma filter
WO2015132367A1 (fr) Appareil de traitement de l'air
KR200451416Y1 (ko) 살균 탈취 기능을 가진 공기조화기
KR20110090539A (ko) 공기 살균정화 장치
KR102263083B1 (ko) 공기 정화 및 소독장치
CN113154608A (zh) 一种等离子灭杀病毒病菌方法及装置
JP2000157621A (ja) 空気清浄機
Matys et al. Disinfectants and devices for surface and air disinfection in dental offices
KR20180078832A (ko) 먼지 및 미생물 검출용 공기 정화 처리 시스템
KR102003536B1 (ko) 공기청정기능을 갖는 공간살균기
US20180147312A1 (en) Ventilation Duct to Eradicate Indoor Odor and Microbes
CN206026742U (zh) 一种多级处理空气消毒装置
WO2020141362A1 (fr) Stérilisateur de salle d'opération et de surface sans stérilisant
KR200422046Y1 (ko) Oh 라디칼 살균기
US20230338605A1 (en) An air purification system and method
JP2003116973A (ja) 空気の浄化方法および装置
US20220111234A1 (en) Personal air purifier

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21838740

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21838740

Country of ref document: EP

Kind code of ref document: A1